gpu: nvgpu: don't reset clk that doesn't exist

If the clock is null, calling the reset function will crash the
kernel. So, don't call the reset function.

Change-Id: I37ef25c8dca67bec8bf6654eb6e275b866bdae53
Signed-off-by: Alex Van Brunt <avanbrunt@nvidia.com>
Reviewed-on: http://git-master/r/742361
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index f6c9f901..eb6774da 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1311,10 +1311,12 @@ static int gk20a_secure_page_alloc(struct platform_device *pdev)
         int err = 0;
 
         if (platform->secure_page_alloc) {
-                tegra_periph_reset_assert(platform->clk[0]);
+                if (platform->num_clks > 0)
+                        tegra_periph_reset_assert(platform->clk[0]);
                 udelay(10);
                 err = platform->secure_page_alloc(pdev);
-                tegra_periph_reset_deassert(platform->clk[0]);
+                if (platform->num_clks > 0)
+                        tegra_periph_reset_deassert(platform->clk[0]);
         }
 
         if (!err)